Some of these programs are written for practice.
Some are born from technical exams and interviews. You may treat the programs here as my potential submission(s) to your exam.
Projects are segregated by primary language. In each project (e.g. golang/project1), Makefile commands are also present.
Inside golang/, for example, you can find "top-level" Makefile commands.
You should be able to run everything with just make, Docker + Compose, and simple env config for some. Use the project-level Makefiles as reference.